Born in France, Leeroy trained as a dancer at the Paris Opera Ballet School and the Ballet School of the Hamburg Ballet in Germany. He performed at the Palais Garnier in Paris and with the Bundesjugendballett as well as the Gala Jia Ruskaja at the Bolshoi Academy in Moscow.
Later, alongside his professional ballet career with the Hamburg Ballet, Leeroy furthered his artistic education at New York University - Steinhardt in Vocal Performance but also at L'ARIA in Acting, leading him to join the Musical Theatre Company at the Royal Academy of Music in London from which he graduated with an MA in Musical Theatre in 2021.
Upon graduation, Leeroy joined the premiere cast of the new West End production of "The Phantom of the Opera" in the role of the Slave Master. He also appeared in the world premiere of the musical "Glory Ride" at The Other Palace.